# CZML DeveloperError: normalized result is not a number

**URL:** https://community.cesium.com/t/czml-developererror-normalized-result-is-not-a-number/27023
**Category:** CesiumJS
**Created:** [September 27, 2023, 9:06pm UTC](https://community.cesium.com/t/czml-developererror-normalized-result-is-not-a-number/27023 "2023-09-27T21:06:26Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![dzeroone](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/dzeroone/32/9985_2.png) [@dzeroone](https://community.cesium.com/u/dzeroone)
#### Post date: [September 27, 2023, 9:06pm UTC](https://community.cesium.com/t/czml-developererror-normalized-result-is-not-a-number/27023/1 "2023-09-27T21:06:26Z")

</div>

I am trying to render a czml, using CzmlDataSource  
but it is showing this creepy error, according to the documentation the formatting should be okay.

Here is the sandcastle link -  
[Normalized result is not a number!](https://sandcastle.cesium.com/#c=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)

Here is screenshot of the error -

 ![normalized-result](https://global.discourse-cdn.com/cesium/original/3X/8/c/8cb65c49528010a7b4672fe9a1a0740ffc8491b6.png)

---

<div class="post-metadata">

### Author: ![Marco13](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/marco13/32/2757_2.png) [@Marco13](https://community.cesium.com/u/Marco13)
#### Post date: [September 28, 2023, 12:01pm UTC](https://community.cesium.com/t/czml-developererror-normalized-result-is-not-a-number/27023/2 "2023-09-28T12:01:07Z")

</div>

From a _short_ look, this seems to be caused by the fact that the `cartographicDegrees` array contains several duplicate points. This is _only_ an observation for now, and I’ll have to read a bit more about whether this is disallowed by the specification, or what other options there could be for avoiding the crash. (It seems like [DeveloperError: normalized result is not a number · Issue #4863 · CesiumGS/cesium · GitHub](https://github.com/CesiumGS/cesium/issues/4863#issuecomment-399929463) is related, but I haven’t read it thoroughly yet).

The following sandcastle does _not_ contain duplicate points and seems to work:

> **[Cesium Sandcastle](https://sandcastle.cesium.com/#c=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)**
>
> The Cesium Sandcastle provides an interactive environment for testing Cesium code.

It might not be “The Solution”, but maybe you want to do further experiments based on this observation.